package string;

public class StringBuilderDemo {
    public static void main(String[] args) {
        /*
        StringBuilder s1=new StringBuilder();
        StringBuilder s2=new StringBuilder("Hello Word");

        String s3="abc";
        StringBuilder s4=new StringBuilder(s3);
        String abc=s4.toString();
         */
        StringBuilder builder=new StringBuilder("好好学习java");
        builder.append(",为了找个好工作");
        System.out.println(builder);

        builder.replace(9,16,"就是改变世界");
        System.out.println(builder);

        builder.delete(0,8);
        System.out.println(builder);

        builder.insert(0,"活着");
        System.out.println(builder);

        builder.reverse();
        System.out.println(builder);
    }
}